These values were recorded as the mass of products when a chemical reaction was carried out three separate times: 8.83 g; 8.82 g; 8.84 g. The mass of the products from that reaction is 8.60 g. The values are:
Precise, but not accurate
100
100 milliliters = _________________ dl
1
100
How is the measurement 0.0000650 cm written in scientific notation?
6.50 x 10^-5 cm
100
What is the density of 37.72 g of material whose volume is 6.80 cc?
5.55 g/cc
200
How many significant digits are in 30.00?
4
200
Which group of measurements is the most precise: (a) 2 g, 3 g, 4 g; (b) 2.0 g, 3.0 g, 4.0 g; (c) 2 g, 2.5 g, 3 g; (d) 1 g, 3 g, 5 g
c
200
0.25 g = ______________kg
0.00025
200
The average distance between the Earth and the moon is 386,000 km. Expressed in scientific notation, this distance is written as
3.86 x 10^3 km
200
An object has a mass of 26.94 g and a volume of 2.568 cubic centimeters. What material is it likely to be made of if the following substances have these densities in g/cc: Iron (7.874); Gold (19.32); Silver (10.49); Copper (8.92)
Silver
300
The measurement 0.035550 g rounded off to two significant figures would be
0.036 g
300
The accepted value is 1.43. Correctly describe the following student experiemental data: Trial 1 - 1.29; Trial 2 - 1.93; Trial 3 - 0.88.
Neither accurate nor precise.
300
1.2 x 10^13 dm =_________________ Gm
1200
300
What is the result of mulitplying 2.5 x 10^10 by 3.5 x 10^-7?
8.75 x 10^3
300
A bottle contains 3.100 mL of a liquid. The total mass of the bottle and the liquid together is 6.300 g. The mass of the empty bottle is 4.240 g. What is the density?
What is 0.665 g/mL
400
Express the sum of 7.68 m and 5.0 m using the correct significant digits.
12.7 m
400
1) Which set of data would measure to the highest accuracy?
a) 260 mL, 250 mL, 255 mL
b) 80.17 cm, 80.15 cm, 80.19 cm
c) 0.00051 g, 0.00092 g, 0.00070 g
c
400
2500 ML = ______________ mL
2.5 x 10^12
400
When 1.92 x 10^-6 kg is divided by 6.8 x 10^2 mL, the quotient equals
2.8 x 10^-9 kg/mL
400
The density of aluminum is 2.70 g/cc. What is the mass of a solid piece of aluminum with a volume of 1.50 cc?
4.05 g
500
The dimensions of a retangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as
4.1 cc
500
A chemist obtained the values 5.2246 g, 5.2353 g, and 5.2501 g for the mass of a sample. Without knowing the true mass of the sample, it can be said that these values have:
Poor precision
500
How many Dg are in 2.5 Mg?
250,000
500
Solve the following and record in scientific notation: (8.200 x 10^2) - (2.0 x 10^-1) =
8.198 x 10^2
500
The density of pure diamond is 3.5 g/cc. What is the volume of a diamond with a mass of 0.25 g?